Novel Current Controller Based on MPC With Fixed Switching Frequency Operation for a Grid-Tied Inverter

In this paper, a novel controller based on the predictive technique has been introduced for a neutral-point-clamped grid-tied inverter. The aim of the developed method is to achieve a constant system switching frequency operation. The proposed method generates the voltage vector by nullifying the de...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2018-08, Vol.65 (8), p.6198-6205
Main Authors: Sebaaly, Fadia, Vahedi, Hani, Kanaan, Hadi Y., Al-Haddad, Kamal
Format: Article
Language:English
Subjects:
Closed-loop space vector modulator (CL-SVM)
constant switching frequency
Control systems
Cost function
cost function optimization
Electric currents
Electronics
grid inverter
Harmonic distortion
Inverters
Mathematical models
Modulation
Power factor
Predictive control
Predictive models
Switching
Switching frequency
Voltage control
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Summary:In this paper, a novel controller based on the predictive technique has been introduced for a neutral-point-clamped grid-tied inverter. The aim of the developed method is to achieve a constant system switching frequency operation. The proposed method generates the voltage vector by nullifying the derivative of the cost function of a finite-set model predictive controller. The developed controller takes in action of injecting the desired grid current while a closed-loop space vector modulator regulates the capacitors voltages. A comparative study with a similar model predictive algorithm with constant switching frequency (MPC-CSF) is introduced and discussed in terms of computational complexity. Experimental results are provided to verify the performance and robustness of the new method over MPC-CSF with its ability of injecting a very low total harmonic distortion to the grid with almost unity power factor during normal and transient operations.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2017.2784400